Optimal power allocation for homogeneous and heterogeneous CA-MIMO systems

查看全文 作　　者：CUI [1]QiMei;KANG [1]PeiChuan;HUANG [1]XueQing;VALKAMA [2]Mikko;NIEMELA [2]Jarno

机构地区：[1]Key Laboratory of Universal Wireless Communications, Beijing University of Posts and Telecommunications;[2]Department of Communications Engineering, Tampere University of Technology

出　　处：《Science China(Information Sciences)》索引2013年第56卷第2期,共14页

基　　金：supported by China-EU International Scientific and Technological Cooperation Program (Grant No. 0902);National Natural Science Foundation of China (Grant No. 61001119);the Funds for International Cooperation and Exchange of National Natural Science Foundation of China (Grant No. 61211130130);Fund for Creative Research Groups of China (Grant No. 61121001);Beijing Nova Program (Grant No.Z12111000250000);supported by the Finnish Funding Agency for Technology and Innovation(Tekes) through the Energy and Cost Efficiency for Wireless Access (ECEWA) project 摘　　要：Carrier aggregation (CA) technique has been adopted by 3GPP LTE-Advanced due to its ability of enhancing the spectrum efficiency and peak data rates through aggregating multiple component carriers (CCs). Two main factors make power control optimization very essential for CA-MIMO radio link: the different channel characteristics in multiple CCs, and multiple power constraint conditions (per-CC, per-antenna and pertransmitter power constraints) in the actual CA system deployment. This paper firstly derives the degenerate conditions of optimal power allocation for a single-transmitter CA-MIMO system. Stemming from the derived degenerate conditions, we propose a modified hybrid gradient optimal power allocation(MHGOPA) algorithm to maximize the system performance. Simulation results verify the validity of the proposed resource allocation approach by comparing with baseline average power allocation algorithm. Finally, we extend the MHGOPA algorithm into a heterogeneous CA network with multiple transmitters working simultaneously. 关键词：LTE-advanced, carrier aggregation, CA-MIMO, heterogenous network, modified hybrid gradient optimal power ALLOCATION

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Optimal power allocation for homogeneous and heterogeneous CA-MIMO systems

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